## 10221 - Satellites

Moderator: Board moderators

Please can you give me some trick test cases
Sleep enough after death, it is the time to work.
898989
Learning poster

Posts: 83
Joined: Wed Feb 01, 2006 12:59 pm
Location: (Fci-cu) Egypt

### 10221 Still WA!!!!!!!!!!!Plz help!

can someone tell why am i getting WA?
I have checked all the test cases provided by the Electronic board. I cannot uderstand also wot wud b the calculation for a=180;

#include<stdio.h>
#include<math.h>
#include<string.h>

#define MAX 5
//#define pi 3.14159265358979323846
#define R 6440

int main(void)
{

double s,a ;
char str[MAX];

//freopen("10221.txt","r",stdin);
pi= acos(-1);
while((scanf("%lf%lf%s",&s,&a,str))==3)
{

if(a>180 && !( strcmp(str,"deg")) )
{
a=360-a;
}

if(!(strcmp(str,"deg")))
{

}
else
{
a=a/60;

}

/*if(a==180) ///is it ok?????????
{
cord= 2.0*R+s;

}*/

if (a<=180)
{

cord=( (R+s)*sin(a/(180/pi)) )/sin((0.5*(180-a))/(180/pi) );

}

printf("%.6lf %.6lf\n",arc, cord);
}

return 0;
}

serendipity
New poster

Posts: 6
Joined: Tue May 09, 2006 9:22 pm

....
U should consider a = 180 & when a != 180..
By the way the formula for chord is
for when a != 180
and Chord_distance=2*radius for when a = 180
am thinking r u calculation ur radius as
sakhassan
Experienced poster

Posts: 105
Joined: Sat Mar 11, 2006 9:42 am
Location: cse,DU

### Re: 10221 - Satellites

All test case has passed but still WA!
where is the problem?
Code: Select all
`#include <cstdio>#include <cmath>#include <cstring>#include <algorithm>#define R 6440#define PI 2*acos(0.0)using namespace std;int main(){   //freopen("in.txt","rt",stdin);   int s,a;   double arcDistance,cordDistance,sinA,sinB;   char str[100];   while(gets(str))   {      sscanf(str,"%d %d %s",&s,&a,str);      if(strstr(str,"min"))         a /= 60;                  s = s + R;      arcDistance = s * a * PI/180;      sinA = sin(a*PI/180);      sinB = sin((180 - a)*PI/360);      if(a != 180)         cordDistance = s * sinA / sinB;            else         cordDistance = 2*s;      printf("%.6lf %.6lf\n",fabs(arcDistance),fabs(cordDistance));   }   return 0;}`

newton
Experienced poster

Posts: 162
Joined: Thu Jul 13, 2006 7:07 am

### Re: 10221 - Satellites

Please say, what is my wrong? i am so suppressed.
Code: Select all
`#include<stdio.h>#include<math.h>int main(){    double s,a,pi,chord,rad,arc;    char ch[6];    pi=2*acos(0.0);    while((scanf("%lf %lf %s",&s, &a, &ch))==3){    if(ch[0]=='m')    a=a/60;    if(a>180)    a=a-180;    rad=pi*a/180;    if(a==180){        arc=pi*(s+6440);        chord=2*(s+6440);        }        else{            chord=2*(s+6440)*sin(rad/2);            arc=rad*(s+6440);            }            printf("%.6lf %.6lf\n",arc,chord);    }    return 0;    }`

debugger
New poster

Posts: 8
Joined: Tue Jul 29, 2008 6:24 pm

### wa pls help

deleted after ac
Last edited by calicratis19 on Tue Feb 10, 2009 4:06 pm, edited 1 time in total.
Heal The World
calicratis19
Learning poster

Posts: 76
Joined: Mon Jul 21, 2008 8:50 am

### Re: 10221 - Satellites

reduce calculation.....
Code: Select all
`accepted`
Last edited by Obaida on Tue Aug 11, 2009 8:33 pm, edited 1 time in total.
try_try_try_try_&&&_try@try.com
This may be the address of success.
Obaida
A great helper

Posts: 380
Joined: Wed Jan 16, 2008 6:51 am

### Re: 10221 - Satellites

i got wa in this problem for a long time. it was nothing but precision err.i just decreased calculation in the code .i printed them directly nd then AC . meaning i did not use variable like arc , cord ,red etc.i did those operation in printf .... hope u understand. nd i didnt understand ur method .i used different method nd it takes less calculation then urs.
Heal The World
calicratis19
Learning poster

Posts: 76
Joined: Mon Jul 21, 2008 8:50 am

### Re: 10221 - Satellites

Code: Select all
`#include<stdio.h>#include<math.h>#include<string.h>#define pi 3.1415926535897932384626433832795int main(){   //freopen("10221.txt","r",stdin);   int s;   char a[10];   long double ans,temp,len,ac,deg;   while((scanf("%d %Lf %s",&s,&deg,&a)==3)){      if(!strcmp(a,"min"))      ans=deg/60;   else      ans=deg;   if(ans>180)      ans-360-ans;   ans=(pi*ans)/180;   ac=6440+s;   temp=(ac)*ans;   len=2*ac*ac*cos(ans);   len=(ac*ac)+(ac*ac)-len;   len=sqrt(len);   printf("%.6Lf %.6Lf\n",temp,len);   }return 0;}`
asif_khan_ak_07
New poster

Posts: 25
Joined: Fri Apr 17, 2009 8:24 am

### Re: 10221 - Satellites

@calicratis19 thank you very much. at last worked by reducing calculation.
More variable although with right calculation surly will get wrong answer.
@asif_khan_ak_07 try to reduce your variables. and don't forget to edit this part.
Code: Select all
`ans-360-ans;`

try_try_try_try_&&&_try@try.com
This may be the address of success.
Obaida
A great helper

Posts: 380
Joined: Wed Jan 16, 2008 6:51 am

### Re: 10221 - Satellites

Why WA?????
Code: Select all
`Solved`
fkrafi
New poster

Posts: 13
Joined: Wed Sep 15, 2010 1:36 pm

### Re: 10221 - Satellites

Remember, if the angle is greater than 180.0(in degrees), then calculate with 360 - angle size . Just do the following thing to avoid complexity, take s and a as double and the angle unit as string(Remember to eliminate buffer). Then if str[0] == 'm', angle(a) = a / 60.0. I got AC without adding 1e-8 or stuff like that. Good luck
You tried your best and you failed miserably. The lesson is 'never try'. -Homer Simpson

plamplam
Experienced poster

Posts: 151
Joined: Fri May 06, 2011 11:37 am

### Re: 10221 - Satellites

I am getting run time error.But I think my code is ok.
My code:

#include<stdio.h>
#include<math.h>
#define pi 2*acos(0)
int main()
{
// double pi=;

char array[5];
while(scanf("%lf%lf%S",&s,&angel,&array)==3)
{
if(angel>180)
angel=360-angel;
//printf("%d\n",angel);
if(array[0]=='m')
angel=angel/60;

printf("%0.6lf %0.6lf\n",ans1,ans2);
}
return 0;
}
sumit saha shawon
New poster

Posts: 19
Joined: Tue Jun 26, 2012 9:19 pm

### Re: 10221 - Satellites

Change line 10 to:
while(scanf("%lf%lf%s",&s,&angel,array)==3)
brianfry713
Guru

Posts: 1771
Joined: Thu Sep 01, 2011 9:09 am
Location: San Jose, CA, USA

### Re: 10221 - Satellites

thanks I have got Ac
sumit saha shawon
New poster

Posts: 19
Joined: Tue Jun 26, 2012 9:19 pm

Previous